Mossberg 835 Ultra-Mag Turkey with Mossy Oak Break-Up Infinity was designed and tested around the demanding requirements of high-power 3 1/2 in 12 gauge magnum ammo. Unlike other new-comers to this specialized market, who just modified their existing 2 3/4 in - 3 in shotguns, the 835 was designed to stay the course. The robust bolt, receiver, and other components are specifically sized for the longer shells and the downrange punishment they dish out. In addition, all 835 Ulti-Mag smooth bore barrels are overbored to 10 gauge bore dimensions, reducing recoil and producing exceptionally uniform patterns from both light and heavy shot charges. Working in tandem with the performance-enhancing overbored barrels, strategic placement of eight ports on each side of the 835 barrel direct gasses upward and outward to not only reduce felt recoil, but to minimize muzzle jump for quick second shot recovery.